Alarm clock



FIG. 1 is a front elevation of an alarm clock showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevation thereof;

FIG. 4 is a right side elevation thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in FIG. 1 are for illustrative purposes only andform no part of the claimed design.

The ornamental design for an alarm clock, as shown and described.